I am having the same problem, the piece is not broken, water valve coming in is fine, filter has been changed. It has not pumped in any new water for a while. Last night I unplugged and defrosted it for 2 hours, when I turned it back on, it sounded as if it ran water. Today I notice that the tray has mini cubes in it. They are not big enough to pop out, only take up about half the size of the tray. Could this be the problem? Should i just top them off and see if it works after that? Thanks for you help